Cisco :: Nexus 7010 - Opinion Of Model Support Network?

As a Senior Network Engineer I have entered into a bit of a debate with our Architect about the use of the mgmt0 interfaces on the nexus 7010 switch (dual-sups, M2 and F2 linecards).I would like to know opinion of the Cisco support network.

I believe the mgmt0 interface should left alone for control plane traffic only and Out Of Band management access (ie ssh).  At the moment I have made a subnet for all VDCs with the mgmt0 (vrf management) sitting in a common subnet.  The physical mgmt0 interfaces from both SUPs are connected a management hand off switch.  The mgmt0s also serves as our control plane for VPCs. The VPC peer-link however is using main interfaces of the line-cards.
 
The opinions;

- The Architect thinks we should use all the mgmt0 interfaces for snmp, ntp, tacacs netflow-analysis and switch management.

- However, I think I should use a traditional Loopback to perform these functions within the linecards.  The mgmt0 should only be used if traditional restricted switch access has failed.

My Basis;

the Loopback never goes down, uses multiple paths (the OOB hand off switch could fail closing switch management access completely).  The mgmt0 should be used as a last resort of management access to CMP.